Sectional grate-bar.



PATENTED FEB. 6, 1906.

W. MGGLAVE. SEOT-IONAL GRATE BAR.

APPLICATION FILED NOV. 3, 1904.

2 SHEBTSSHEBT 1.

l/witness PATENTED FEB. e, 1906. W.- MQGLAVE. /SEOTIONAL GRATE BAR. APPLICATION FILED NOV 3 1904 UNITED STATES PATENT OFFICE.

WILLIAM MoCLAVE, OF SCRANTON, PENNSYLVANIA, ASSIGNOR TO "MoOLAVE-BROOKS COMPANY, A CORPORATION OF PENNSYLVANIA.

SECTIONAL GRATE-BAR.

Specification of Letters Patent.

Patented Feb. 6, 1 906.

Application filed November 3,1904. Serial No. 231,250.

Scranton, in the county ofLackawanna and State of Pennsylvania, have invented certain new and useful Improvements in Sectional Grate-Bars; and I do hereby declare the following to be a full, clear, and exact descri tion of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The present invention relates to improvements in rate-bars, and especially to gratebars whic are designedfor use in furnaces where it'is necessary to support fuel which has to be subjected from time to time to a rocking movement of the grate, in which there is no increased opening into the ash-pit,

A and at intervals to a cut-out movement of the grate by which accumulations of ashes or clinkers are cut from thebed of fuel and deposited in the ash-pit.

The inventionconsists in certain novel constructions, combinations, and arran ements of parts, as will be hereinafter fully flescribed and claimed.

In the accompanying drawings, Figure 1 is a top lan view of a grate-bar havin some of its fue supporting caps removed. Fig. 2 is' a side elevation of the said bar. Fig. 3 is a vertical transverse sectional view through the bar, one of the removable fuel-supporting caps being shown in position in the socket of the bar. Fig. 4 is a view in elevation of one of the caps of thebar looking at the overhanging part of the said cap. Fig. 5 is a side elevation of one of the caps removed from the body portion of the bar. view showing one of the inverted-V-shaped spacing-lugs employed in holding the lower end of the cap-shanks in place in a socket of the body portion of the grate-bar.

In successfully handling many kinds of fuel, and especially fine anthracite fuels, it is advantageous to employ grate-bars formed with removable caps, the said caps being carried by body portions having sockets therein which receive the stems or shanks of the said caps. It is especially advantageous in many instances to use grate-bars which are ca )able of a rocking movement while the fuel is being consumed upon the grate. This is true not only when it is necessary to impart movement to the fuel by the rocking of the grate- Fig. 6 is a detail bars, but when it is necessary at suitable intervals to out out and discharge accumulations of ashes and clinkers from the bed of fuel and deposit the same in the'ash-pit of the furnace. The present invention is especially adapted for use where there is need for that type of,

grate-bar which is capable of a rocking movement in acting upon the fuel and also of cut ting out ashes and clinkers therefrom.

The grate-bar forming the subject-matter of the present application is, as illustrated in the drawings, formed with a supporting body portion 1, which is provided with a number of sockets 2. made hollow, and in the space between the walls thereof the sockets are formed in which there is ample room for receiving the shanks of the caps and also to provide a considerable air-space around the said shanks when in place in said sockets. The sockets are formed by means of partitions 3, extending suitable intervals and connecting'the front and rear walls of the body ortion. The body portion 1 is somewhat t ickened at its ends a'nd provided with outwardly-extending The body portion of the bar is -7 5 transversely of the body portion of the bar at trunnions 4, which arecapable of supporting the bar movably in position in a grate-frame. The trunnions 4 are made to fit in bearings formed in carrier-bars of any usual or desired type which are arranged in the combustionohamber of the furnace. The bars are thus held in such a manner that they may be rocked back and forth uponthe trunnions 4,

the rocking operating to tip the body portion of each bar first in one direction and then in the other to a greater or less degree, as found necessary. The bars are provided with means by which they may be rocked, the said means preferably consisting in a depending arm 5, having a laterally-extending pivot pin or stud 6, which may be engaged by an operating-rod or other suitable device.

I The bar of the present invention is preferably formed with caps which are approximately L-shaped in side elevation, as shown in Figs. 3 and 5, the projecting noses of the L-shaped portions being especially adapted for cutting out clinkers and ashes from the bed of fuel resting upon the grate-surface. In order'to properly sup ort and back up fuelsupporting caps of tlie type shown in the extends upwardly a greater distance than the other wall 8. The wall 7 is upon the opposite side of the shanksof the caps from t e pro, jectin noses'of'said cap. he upper ed es I of bot ,of-said walls 7 and 8 extend inwar ly at an an le, so as to strengthen the body portions of t e bars laterally and at the sametime to afford such a bearing means upon the shanks of the caps that ventilatingespaces, as 9 and 10, are provided for ermitting of the circulation of air through t e said body por..

tion of the bar.

The up er portion of the body portion of the bar is W1 er than the lower portion thereof and accommodates. the upperportions of the shanks, which are largerthan the lower ends thereof. The lower portions of-the sockets are flared outwardly, as at 11,'so that any accumulations of ashes or dust within the body portion of; the bar may find ample outlet at.

e l The lower edge of the wall 8 is formed with an inwardlythe lower ends of the sockets.

- extendingspacing portion v12, similar to spacin portion at the upper edge of said wall. pen-the inner surface of the'opposite wall 17 in each socket is a spacing lug orproe jecti'on13', which is made with inclined upper surfaces preferably like that of an inverted V,

' The shapeof the In isthus, such that the tance 'toalmost bridgethe space between the.

siftin'gs of ashes whic pass'fthrou hthe sockets cannot accumulate upon the ug, but will slide uponthe inclinedupper surfaces thereof and. pass out through the outwardly-flar ng lower "end ortion 11' of the socket o Thejfue supporting portions of the gratebar are made up of a number ofreinovable caps 14. The said caps maybe made of greater or less width, as desired; butthe proportion of the surface oiferedby'eachjca to the heatofl;

the burning fuel is preferably ike that shown in theidrawings, It is not well to present long'lines of metal to thecontraction and eX- pansion of the varying "degreesof heat at.- tained in the furnace. E'ach cap is. made witha central head 15, whichis projected'be-v lowand reduced in cross-sectional area t'o-r ward its lower end to form a shank 16.

The head 15 and the extension thereof 7 forming the shank preferably taper uniformly from top to bottom in a transverse direction, so as to form a wedge-shaped member ex v tendin parallel with the longitudinal plane of the 'ody portion of the bar; j Extending.

in one direction-from the head 15 are webs 17 made of considerable len th and extending beyond the walls 8 of the 7 ar a sufficient dis-v body portion of thebar and the adjacent bar.

"of t Thewebs 18 exten sufficiently to one side of the head 15 to. overhang theupper edge of the wall? of the bar body portion and com plete. at their edges the curvature of the outer surface of said wall 7 The webs 17 are curved upon their upper edges preferably upon arcs Protecting from the other side of the head 151 e cap are com arativelyshort .webs 18.

of circles, and projecting opfpositely from fuel which is placed upon the grate surface The mesh 7 e same web, is

without letting t .I'Iln'. througlh. between the teeth, also upont regulated with th'esamep'urp'ose in view. It

will be apparent that for extremely fine fuels,

such as some, of thesmallest anthracite fuels,

it will be necessary-to have quite small opena ings between the teeth 19 "of the bar-caps, though the a "ertures betweenthe teeth may be'enlarged; or larger fuels, it being always desirableto ermi't an ample supply ofair to pass upwardlythrough the grate-surface.

usually connect at least two of the webs 17 at. their outer ends or noses by connecting por.-. tions 20, thou h it will 'be understoodthat I may connect a lithe webs at theirouter ends, These connections serve as ties for the outer ends of said webs and hel maintain them in pro e1v relation to each ot er.

' he Webs[18,-.projecting oppositelyfrom I thewebs 17, are connected along their upperand side edges by'a solid' portion 21, the said solid portion 21 forming a tie for allof'said webs as well as providing a suitable fuel-sup: ortingportion above the deepest Wall of t e IOQ , ody portion of the bar. 7 The lowerends of the webs 18 extend downwardly, so as. to 'en-.

age and rest upon the upper inclined sur-.

ace of the wall7. The ower ends of the said webs 18 rest upon abutment lu'gs 22. The, endedges ofthe webs. 18 are also providedwith notches or cut-away portions 23, These point where the end edges of the webs 18' meet the surface of the body portion of the bar. These notches'or'cut-away' portions 23 make it possible to obtain a perfect fit between the lower supporting edges of the webs 18; and

the upper inclined edge. of the bar body por- I cut-away portions are formedadjacent to the tion, the ends of the connecting tie portion 21 I projecting a sufiicient distance beyond the outer webs 18 tobe flush with the. endsof the,

outer fuel-supporting teeth 19. The head 15 of the .capis also extended in the form ofalateraltooth 24 at each end to bring the same flush with the ends of the portion 21 'and the teeth 1a,.

are infclined-inwardl toward theshanks 16 0f the caps, the said e ges are cut away, so that only portions of the walls touch the said hanks vided for the passage of air through the body portion of the grate-bar and along the sur- Wheretheupper edges of thewall's 7 and 8 V Inthis manner ample space is pro face of the cap-shanks. The space between the wall 7 and the lower end of the shanks is sufiicient to permit ash or dust which may enter the openings at the top of the bar to pass out from the same at the bottom. Such discharge of accumulated materials is further facilitated by the flaring mouth of the outlet, as heretofore described. The shank 16 of each cap is also reduced in width toward the lower end, as clearly'shown incFig. 4, so that the spaces between the edges of the shanks and the ends of the sockets flare downwardly. This prevents the accumulation of ashes in the sockets or the clogging of the air-spaces which surround the shanks of the caps. The upper portion of each socket is contracted endwise, so as to bear against the edges of the shanks 16.

Each cap is preferably provided with a securing-pin 25, which is secured in the lower end of the shank 16 and made sufficiently long to be bent or turned over the edge of the bar, as clearly shown in Fig. 3.

As thus far described the caps are adapted for insertion in any of the intermediate sockets of the body portion of the grate-bar; but the caps which are fitted in the endisockets of the bar are usually made slightly different. Such caps, as shown in Fig. 2, are provided with outer overhanging edges, as 26.

- These overhanging edges are preferablymade solid and are inclined upon their under edges. The end caps may also be provided with a less number of laterally-projecting webs, if

preferred, although of course they may have the same number of webs as illustrated with respect to the intermediate caps without departing from the spirit of the invention. Where the end caps are made narrower than the intermediate caps, the sockets in the bar are made of a correspondin length.

It will be seen that the ormation of the cap is such that all of the parts taper in one direction namely, .downwardly and in this way not only will ever thing which can pass through the mesh of t e caps be free to drop into the ash-pit, but the caps themselves are rendered easy of manufacture, since they can be readily drawnfrom the sand in casting.

It will be further observed that the engagement of the wall 7 withthe head of the cap and at a high point/thereon, together wit bly adapted for handling fuels of small size,

especially small anthracite fuels, which often burn out grate-surfaces when the said surfaces are not properly constructed. The

a said abutment edge of at the overhanging webs 18, make it possible to move the caps in a cutting-out operation with great power and Without material strain upon dling of such fuels without the likelihood of burning out, but are especially adapted' for rocking movements n whichno increase m size of openings'between the bars is made.

and cut-out movements in which the bars are so rocked as to slice or cut out portions of the ashes and clinke rs upon the surface ofthe grate.

Having now described my invention, what I claim'as new, and desire to secure by Letters Patent, is r 1. A grate-bar, comprising a body portion and removable caps provided with cutting edges, the body portion having walls of unequal heights, the higher wall'engaging the caps at points opposite the cutting edges thereof with respect to the axis of the gratebar andoflering an abutmentof great strength to them when the bar is rocked to cut out ashes and clinkers. 1

'2. A grate-bar, comprising ,a body portion provided with sockets and caps v rovided with socket-engaging portions, 'sai sockets flaring upwardly and downwardly from the f central. arts thereof, one lon itudinal wall of said b0 y portion being thic ened at its upper portion .to increase the strength thereof, and the flaring of the lower portions of the sockets facilitating thedisc'harge of materials therefrom.

3. A grate-bar comprising ,a body portion having elongated sockets formed therein, the said sockets having flaring outlets at their lower ends, removable fuel-engagin caps mounted upon thebar and provide with shanks extending into the said socke,ts,:the body portion being formed with V-shaped lugs arranged in each of said sockets pro'ecting from one of the walls thereof to old the lower ends of the shanks in position, and the inclined surfaces of the \l-s'haped lugs pr.e, venting the collection of ashes or dust in the sockets.

4. A grate bar, com rising a socketed body portion having an a utment ed e rising from one of its side walls ,and remova le caps each having a shank formed to fit into a socket of the body portion of the bar and lat erally-extending webs, some of which are formed with recesses ca able of fitting upon iie .cap portion of the bar.

5. A grate-bar, .com rising a socketed body portion having an a utmented e rising from oneofits side Walls and-remova 1e caps each comprising a shank formed to fit into a socket of the :body portion of the bar and latorally-extending webs, the webs upon one side of the shank being shorter than those upon the other side, the said short webs being formed with recesses ca able of fitting u on said abutment edge of t e body portion 0 the bar.

6. A grate,-bar,-comprising a body portion shanks and forming abutments for driving and removable ca 5 having ends adapted to the caps into the fuel when the bar is rocked. 1o be driven into fire and shanks engaging the 'lntestimony whereof I afiix my signature said body portion, the body: ortion having in presence of two witnesses.

5 walls'of unequal heights, the igher wall en- WILLIAM MGCLAVE.

gaging the :shanks at higher points, than the Witnesses: lower wall, so as to be approximatelyoppo- CAssELL SEVERANGE, site the endsof the caps with respect to the. ARTHUR L.KITGHIN. 

